Why Does Coffee Cause Bad Breath? http://www.livescience.com/33818-coffee-bad-breath-llmmp.html Accessed December 4, 2016.
Coffee breath: Would you like your coffee with or without the bad breath? http://www.abc.net.au/local/stories/2009/07/10/2622265.htm Accessed December 4, 2016.
How to Avoid Getting Coffee Breath. http://drinks.seriouseats.com/2013/10/coffee-breath-how-to-avoid-and-fix-bad-breath-from-espresso.html Accessed December 4, 2016.
Beat Your Smelly Coffee Breath! http://www.menshealth.com/health/beat-smelly-coffee-breath Accessed December 4, 2016.